Sewing machine presser foot



Sept. 11, 1945.

J. COSENTINO 2,384,454

SEWING MACHINE PRESSER FOOT Filed Sept. 30, 1940 2 Sheets-Sheet 1 l l 1 1 x I I I l u 1 12 @Q Q: YW' #93 g 33 as 5 6 =6 5 ,z L 34 INVENTOR.

(/0.$EPH Cosew 77/v0 A T TORNEX ept- II, 1945 J. COSENTINO SEWING MACHINE PRES SER FOOT Filed Sept. 30, 1940 2 Sheets-Sheet 2 R O W m 36 (JOSEPH Cosaw 7/N0 TTORNEX Patented Sept 11, 1945 UNITED STAT.

Es OFFICE This invention relates to an improved presser foot for sewing machines, and has for its general object and purpose to provide an efficiently operating device of this kind for use in the'quantity production of dress materials or fabrics provided with hemstitched or open ladder work seams.

Another object of the invention is: to provide a presser foot for use in connection with a standard two needle sewing machine and whichco'mprises independently movable presser foot -sec-; tions and an interposed vertically yieldable blade, said presser foot sections engaging the edges of two pieces of fabric connected by a loose line of stitching to turn the same and form hems while saidblade acts to separate the hemmed edges-of the fabric sections as they are fed to the vertically reciprocating needles of the sewing machine and securely stitched closely adjacent to the opposed edges of said hems connected by the transverse stitches. 1 l

It is also, a further object of the-invention to provide a simple and easily adjustable means-for regulating or varying the pressure of said verti-. cally movable blade.

With the above and other objects in view,ithe invention consists in an improved presser foot for sewing machines and in the form, construction and relative arrangement of the several parts as will be hereinafter described, illustrated in :the accompanying drawings and subsequently 'incorporated in the subjoined claims. I

In the drawings, wherein I have shown several simple and practical embodiments of the invention, and in which similar reference characters designate corresponding 'parts throughout the several views:

Fig. 1 is a top plan view illustrating one'embodiment of the improved presser foot and showing the same in operative relation with fabric materials as they are fed beneath the presser foot to the stitching mechanism of the machine;

Fig. 2 is a front end elevation.

Fig. 3 is a rear end elevation. I

Fig. 4 is a side elevation of the presser foot.

Fig. 5 is a vertical transverse section takensubstantially on the line 55 of Fig. 4.

Fig. 6 is a vertical sectional view taken on the line 6-6 of Fig. 5. I

Fig. 7 is a vertical transverse section taken on the line 11 of Fig. 6.

. Fig; 10 is asimilar view showing the fabric sectionshaving stitched hems and open ladder work connection as produced in the operation of the presser.foot.-;

LFig. 111. isf'a perspective view illustrating a slightly. modified form of the presser foot, and

. Fig. 12 is a detail side elevation showing an other embodiment of thespreader member.

.Referring. in detail :to the drawings, 5 designates" partof the bed of a sewing machine and 6 thegconventional throat plate with which the usual feed mechanism cooperates to progressively feed the fabric materials beneath the presser foot.

1 designatesthe-vertically reciprocating needle barjto the. lower end; ofrwhich the two transversely.spacedneedles; indicated at 8, are suitablyconnectedg, .1; V

-.The ,lowerend-of the presser foot bar 9 is slotted or bifurcated asjat ID to receive the vertical shankilllzof thebody member ll of the presser foot, said shank-being .detachably connected with the barn9. by. the screw indicated at 13.

The body. I I of the presser, foot is provided with transversely spaced vertical slots 14 which open upon thefront face of said body member and receive theavertical arms .15 of L-shaped supporting members for- .the: independently operable presserfoot sections- Each presser foot section 16 has ailongitudinally slotted upper portion to receive; thejforwardly: projecting horizontal arm 1 ll of one ,of said supporting members, said arm is longitudinally inclinedupwardly so as to per- Fig. 8 is a vertical longitudinal section taken on 5 the line 8-8 of Fig. '7.

Fig. 9 is a fragmentary plan view showingtwo superimposed fabric sections having pinked edges and connected by a looseline of stitching.

mit of a slight. rocking motion of the presser foot section IS with: respect to said supporting member; -Thus,i5it will be understood that in the operation of the deviceupon materials of differentthicknesses, these presser foot sections may have a vertical.movementrelative to each other and with respect to the presserfoot body II and also have an independent rocking or tilting movement-upon thelo'wer ends of the respective sup porting members mounted in said body section.

- Between .thetwo presser foot sections there is arranged the-yertically'yieldable spreader blade sections I6, said projecting end of the blade being tapered in wedge shaped form, as indicated at 24. The rear end of said blade projects upwardly within a slot 25 formed in the presser foot body II and is connected with said presser foot body by the transverse pivot pin 26. This end of the blade is also formed with the finger 21 projecting upwardly above the pivot 26. This finger is engaged by the inwardly bent end portion 29 of a transversely positioned leaf spring 28, the other the invention is adaptable for use in connection end thereof being fixed to one side of the presser foot body II by the screw indicatedat ll. a

The spring plate 28 is provided with an opening to receive the adjusting screw 3t threaded in I with a wide variety of fabrics and will operate to accurately fold and form the hems, although there maybe an appreciable difierence in thickness between the respective fabric layers.

' In Fig. 11 of the "drawings, I have illustrated Tan alternative form of the device in which, in-

stead 'of using the adjustable plate spring 28 tion 29 of said spring againstv the finger 21-01.

the spreader blade 23 may be regulated as desired so as to increase or decrease the resistanceof said spring to vertical .movementof the. horizontal portion of the spreader blade. with respect to the presser foot sections 16.

Each of the presser foot sections terminates at its forward end in. an upwardly inclinedflangefl. which is formedat the inneredge thereof \with a downwardly extending web 33,'said web and flange being shaped or fashioned to provideia. smooth thatas the edges of fabric layers are pinkcd, as

shown at P,.they are simultaneously stitched together in parallel relation withsald pinked edges by a single row of loose stitches, indicated at S. These stitches are formed in the manner well known inthe art by the use of a looperin connection .with the. usual thread receiving hook which produces along loose-stitch. a

The connected fabric layers arenowextended laterally from, the line of stitching Sin opposite directions and positioned upon-thebed' plate 5 j of the machine in advance of the presser foot, with the pinked edges P thereof vertically disposed. With the presser foot in elevated positionand the forward end of the separatonblade 23 bearing upon the surface of the throat plate 6, the fabric sections aremanually moved beneath the presser foot, the front wedge shaped end 24 of said blade being disposedbetween the.two layers of fabric. and bearing upon :the stitches S.

In the operation of the .machine'asthe fabric layers are progressively fed. to the stitching mechanism, after the presser foot is lowered to its normal position, the upstanding pinked edges P of the fabric sections, contacting with the webs 33 and flanges 32.0f the presser footlsections, are turned laterally. in oppositedirections and folded down to form the hems H, as said folded edges are simultaneously spread apart by the blade 23, as clearly shown in Fig. 1 of thedrawmgs. blade'23, the loose stitching S is tautly drawnv transversely between the hem folds, The respective folds of the hems'I-I are, thenstitched down closely adjacent to the fold lines, as at S, by the vertically reciprocating needles 8, so that the tautly drawn stitches S form the ladder-like Of course, in the spreading action of the above described, I may employ a loop 36 of resilient wire secured at one of its ends by a suitable'screw 31 to the shank 12 of the presser foot, the other .end of this spring loop having resilient bearing engagement on the upper edge of the separator blade 23 at its forward end. While this.:.device will operate effectively, for obvious reasons, the first. described construction, which permits of variationand adjustment in the vertical pressure of the spreading or separating blade, .is preferred.

InFig. 12, I show, another form of the vertically yieldable. spreader member. This spreader mem-. ber. orblade 2.3, which is of the same general form as that above described, and is mounted between the presser foot members in a similar manner, hasits forward end slotted or recessed as shown at. to receive an anti-friction disk 31 rotatably mounted upon the transverse pin -38 fixed at itsv opposite endstothe blade 23'. The perimeter of this disk is beveled or tapered, as at 39, so that th'ere will be a minimum of surface contact thereof upon the connecting threads or stitches S between the two fabric sections. This roller or disk extends slightly in advance of the leading edgeof the. blade 23' and first engages and separates the opposed edges of the fabric sections, By th'us reducing frictional contactof the spreader means .upon theloose threads S, re-.

sistance to theseparation of thehemmededges of thetwo fabric sections and the drawing of said stitches to'a taut condition as the respective hems are stitch'eciby the vertically. vibrating needles is practically eliminated.

"From theforegcing description considered in connection with the accompanying drawings, thea large variety of, fabrics of different structural Y characteristics.

Whilethe invention, particularly as illustrated pi in Figs. 1 to 8 hereof, has been thoroughly tested with excellent results, it is nevertheless to be understood that insofar as the particular form, construction and relative arrangement of the several elements is concerned, in these particulars, the invention may be susceptible to more or less modification or change. Accordingly, the privilege is reserved of incorporating the essential features of the present disclosure, in such other alternative mechanical forms, as may fairly be considered a comprehended within the spirit and scope of the appended claims.

Iclaim: V i

1. In combination with stitching mechanism having a pair of vertically reciprocatingneedles, spaced apart presser foot members each having an opening to receive one of said needles, said membersat their forward ends'being provided with means for engaging connected upstanding edge portions of two fabric sections fed to the stitching mechanism to turn the same in relatively opposite directions and form hems therein, a vertically movable spreader blade interposed ;betweensaid presser foot members in immediate adjacency with said hem turning means to extend longitudinally between the hem folds of the fabric sections and maintain the same in spaced apart non-contacting relation .to a point in close proximity to the penetration of said folds by the respective stitch forming needles, and means for yieldably resisting vertical movement of said blade relative to the presser foot members.

2. In combination with stitching mechanism having a pair of vertically reciprocating needles, spaced apart presser foot members each having an opening to receive one of said needles, said members at their forward ends being provided with means for engaging upstanding connected edge portions of two fabric sections fed to the stitching mechanism to turn the same in relatively opposite directions and form hems therein, a vertically movable spreader blade interposed between said presser foot members in direct engagement therewith and having means to direct said fabric edges to the hem turning means and the lower edge portion of said blade adapted to enter between the hemfolds of the fabric sections and maintain the same in spaced apart non-contacting relation to a point in close proximity to the penetration of said folds by the respective stitch forming needles, means for yieldably resisting vertical movement of said blade relative to the presser foot members and means for variably regulating the resistance of said latter means.

3. In combination with stitch forming mechanism having a pair of vertically reciprocating needles, presser foot members of similar construction associated with the respective needles and provided with means at their forward ends for engaging upstanding edge portions of two sections of fabric connected by a row of loose stitches to fold the same in relatively opposite directions and form hems therein, and a spreader blade yieldably movable in a vertical plane between said presser foot members, said blade having means for directing the fabric edge portions to said hem folding means and also having a part engaging the hem folds to separate the same and tighten said loose stitches and to maintain said folds in separated parallel relation in proximity to the point of penetration of said folds by the respective needles.

4. A presser foot for a standard two needle sewing machine comprising a pair of spaced apart presser foot members independently oscillatable in vertical planes, and a, spreader blade interposed between and directly engaged with said members having an end portion projecting in advance of said members and provided with means cooperating with said members to separate connected edge portions of two fabric sections and form hem folds therein as said sections are fed beneath the presser foot members.

5. A presser foot for a standard two needle sewing machine comprising a pair of spaced apart presser foot members independently oscillatable in vertical planes, a spreader blade vertically movable, between and directly engaged with said members having an end portion projecting in advance of said members and provided with means cooperating with said members to separate connected edge portions of two fabric sections and formh'em folds therein as said sections are'fed beneath the presser foot members, and means for yieldably resisting vertical movement of the spreader blade relative to said presser foot members. V

6. A presser foot for a standard two needle sews ing machine comprising a pair of spaced apart presserv foot members independently oscillatable in vertical planes, a spreader blade vertically movable between said members having an end portion projecting in advance of said members and provided with means cooperating with said members to separate connected edge portions of two fabric sections and form hem folds therein as said sections are fed beneath th'e presser foot members, means for yieldably resisting vertical movement of the spreader blade relative to said presser foot members, and means for adjusting said last named means to regulate the resistance thereof to relative movement of the spreader blade.

7. A presser foot for a standard two needle sewing machine comprising a pair of spaced apart presser foot members and means for mounting said members-for relative bodily vertical movement; said means including a support for each member, means pivotally mounting the presser foot member on the support for vertical oscillating motion, and a spreader blade interposed between and directly engaged with said presser foot members, said blade and members at their forward ends having directly cooperating mean engaging the connected edge portions of two fabric sections to fold said edge portions in relatively opposite directions and form spaced apart hems therein as they are fed beneath said presser foot members.

8. A presser foot for a standard two needle sewing machine comprising a pair of spaced apart presser foot members and means for mounting said members for relative bodily vertical movement, said means including a support for each member, means pivotally mounting" the presser foot member on the support for vertical oscillating motion, a pivotally mounted spreader blade vertically movable between said presser foot members, said blade and members at their forward ends having directly cooperating means engaging the connected edge portions of two fabric sections to fold said edge portions in relatively opposite directions and form spaced apart hems therein as they are fed beneath said presser foot members, and means for variably resisting vertical movement of said spreader blade to maintain a predetermined pressure contact thereof upon the conneCting means between the fabric sections.

9. In combination with stitch forming mechanism having a pair of vertically reciprocating needles, presser foot members of similar construction associated with the respective needles and provided with means at their forward ends for engaging upstanding edge portions of two sections of fabric connected by a row of loose stitches to fold the same and form hems therein, a member mounted between said presser foot members, and a disk carried by said latter member rotatable in a vertical plane to engage and separate said connected edges, said disk projecting in advance of the presser foot members and having peripheral contact upon the connecting stitches between said hems.

10. A presser foot for a standard two needle sewing machine comprising a pair of spaced apart presser foot members having means at their forward ends for engaging upstanding edge portions of two sections of fabric to fold the same and form hems therein,and means for separating said hems in the feeding movement of the fabric sections between the presser foot members, including a rotatable disk mounted between the presser foot members and projecting in advance thereof to engage and separate the opposed edge portions of the fabricsections.

11. A presser foot for a standard two needle sewing'mach'ine comprising a pair of spaced apart presser. foot members having means at their forward ends for engaging upstanding edge portions of two sections of fabric to fold the same and form hems therein, and means for separating said hems in the feeding movement of the fabric sectionsibetween the presser foot members, including a vertically movable rotatable disk mounted between the presser foot members and projecting in advance thereof to engage vand separate the opposed edge portions of thefabric sections, and means for yieldably resisting vertical movement of said disk relative to the presser foot members.

12. A presser foot for a standard two needle sewing machine, comprising a body, laterally spaced apart presser foot members extending forwardly from said body, a spreader blade interposed between and closely interfitting with said presser foot members, means for pivotally mounting said blade at one of it ends upon said body forvertical movement relative to said presser foot members, said blade and members at their forward ends having cooperating means engaging opposed connectededge portions of two fabric sections fed beneath the presser foot to fold said edge portions in relatively opposite directions and form spaced apart hems therein, and means for yieldingly resisting vertical movement of the spreader blade.

13. A presser foot for a standard two "needle sewing machine comprising a body, "laterally spaced apart presser toot members and means for mounting said members upon the body for avertical bodily movement relative thereto and for independent oscillatory movement in a vertical plane, a spreader blade interposed betweentand closely interfitting with said presser foot members, means for mounting said blade at one of its ends on the body rearwardly of said presser foot members for verticalmovement relative thereto, said blade and members at their forward ends having cooperating mean to engage the connected edge portions of two fabric sections fed beneath the presser foot and fold said edge portions in relatively opposite directions to form spaced apart hemsth'erein, and means for yieldably resisting vertical movement of the spreader blade.

- 14. In combination with stitching mechanism having a plurality of vertically reciprocating needles, laterally spaced apart presser foot members each having an opening to receive one of said needles, each presser foot member at its forward end being provided with hem folding means and a spreader means interposed between adjacent presser foot members and having a part positioned in advance of said members to separate and direct opposed edge portions of fabric sections fed to the stitching mechanism into contact with the hem folding means of said adjacent presser foot members, said spreader means also including a part to enter between and engage with the opposed hem folds and maintain the same in separated non-contacting relation in the progressive feeding movement of the fabric sections and substantially to the point of penetration of the hem folds by the stitch forming needles.

JOSEPH COSEN'I'INO. 

